Erasing device



R. J EN N Y ERASING DEVICE Aug. 14, 1951 2 Sheets-Sheet 1 Filed Nov. l5,1946 Aug. 14, A1951 R. JENNY 2,564,604

ERAsING DEVICE Filed Nov. 15, 1946 2 Sheets-Sheet 2 Patented Aug. 14,19-51 ERASING DEVICE Rene Jenny, New York, N. Y., assignor, by mesneassignments, to Blue Robin Corporation, New York, N. Y., a domesticcorporation Application November 15, 1946, Serial No. 710,084 v InSwitzerland November 15, 1945 4 claims. (Cl. 12o-s6) 'I'he presentinvention relates to rotary erasers and is more particularly directed toinstruments wherein rotary motion is manually imparted to an eraserduring the erasing operation by reciprocal movement of a handle withrespect to the instrument.

One of the principal objects of the present invention is to provide anerasing instrument with means in the convenient grasp or reach of theoperator whereby the eraser may be adjusted and retained in the properadjusted positions with respect to the matter to be erased upon a sheetof paper.

Another equally important object of the invention is to provide aninstrument with a rotary driven eraser having a beak shaped lug whichmay have supporting engagement with any conventional forked type-barguide of a typewriter and yet have an adjustable connection therewithwhereby the eraser may be retained in proper erasing positions withrespect to a sheet of paper having matter thereon to be erased as itpasses on the platen roller of the typewriter.

Another important object of the invention is to provide an instrumenthaving ra rotarily driven eraser with a telescopic handle whereby whennot in use it maybe retained in a shorter position so as rto take up arelatively small amount of space.

A still further object of the invention is to generally improve thedetails of construction and arrangements of parts employed in rotaryeraser instruments of the aforesaid character whereby the erasingoperations will be more eiliciently performed and yet less expensive inthe cost of manufacture thereby rendering the same more commerciallydesirable.

In the accompanying drawings:

Fig. 1 is a plan view of the instrument when contracted embodying thepresent invention.

Fig. 2 is another plan view of the instrument when expanded.

Fig. 3 is an enlarged longitudinal sectional view.

Fig. 4 is an enlarged transverse section taken in the line 4 4 of Fig. 3in the direction of the arrow points.

Fig. 5 is another enlarged transverse section I taken on the line 5-5 ofFig. 3 in the direction of the arrow points.

- Fig. 6 is still another enlarged transverse secr tion taken on theline 6--6 of Fig. 3 in the direction of the arrow points.

Fig 7 is a detail bottom plan view of one end of the instrument.

Fig. 8 is a plan view of the supporting member when adjusted for useother than with the typebar guide of a typewriter. o

Fig. 9 is a bottom plan View of the same showing another adjustedposition. thereof.

Fig. 1'0 is a side elevation of the instrument when applied to atypewriter having one form of type-bar guide. j,

`Fig. 11 is a similar detail View of the instrument when applied to atypewriter having another form of type-bar guide.

Fig.v 12 illustrates how the instrument is positioned when performingordinary erasing operations, and

Fig. 13 illustrates how the instrument may be supported without the useof the type-bar guide of a typewriter when retaining the eraser.

The instrument as shown in the accompanying drawings comprises a tubularhandle section I having a tapered opened end 2 and a threaded socket 3formed in its opposite end for removably and detachably receiving aclosing plug 4. Suspended concentrically within this tubular section Iis a cylindrical tube 5 forming a space 6 between the inner peripheralsurface of the handle section I and the outer peripheral surface of thetube 5 with a coil spring 'I freely housed therein. The cylindrical tube5 has one end secured to the handle section I and its opposite or freeend has formed therewith a bearing block 8 through which extends aspindle 9. This spindle lis provided with a threaded end to which isconnected a screw nut I0 of suicient outside diameter as to freely movewithin the tube 5, but which when attached to the spindle,

prevents the latters withdrawal through the bearing block 8. The spindle9 has a helical twist and extends through a correspondingly shapedopening through the block 8 whereby when the latter reciprocates alongthe spindle a rotary motion in opposite directions will be transmittedto the latter.

Slidable within the space 6 against the tension of the spring 'I is oneend of a connector section II having a threaded plug I 2 arrangedadjacent the outer or opposite end thereof to which is detachablyconnected .a bearing sleeve I3. I3 have a substantially L-shaped grooveVIII therein as best shown in Fig. 2 of the drawings and slidable withinthis groove'is a pin I5 secured to the handle section I When the handleis extended due to the expansion of the spring I the pin I5 will freelyslide within the longitudinal part of this groove thereby preventing therotation of the handle section I with refy Y,

The outer periphery of the sections II and spect to the connectorsection II. The .pin I5 may be moved into the transverse perlpheral partof the groove I4 by giving a slight turnv when the latter is not in useor when it is beingv used for ordinary erasing operations, asillustrated in Fig. 12 of the drawings.

The helical spindle 9 extends through the plug I2 and has formedtherewith an annular bearing block I6 which latter has bearingengagement with one end of the plug I2. The extended portion I1 of thespindle is preferably of a square or rectangular cross section so thatwhen it fits within a correspondingly shaped recess of the slidablesocket member I8' the latter will V.be caused to rotate therewith. Thiscylindrical socket member I8 has an exterior diameter slightly less thanthat of the opening within the eraser holding section or nipple I9whereby it may freely reciprocate therein and arranged between thesocket member I8 ,and the annular shoulder of the bearing sleeve is alight compression spring 26 which normally holds the socket memberagainst the inturned flange 2I formed at the outer end of the nipple I9.

A chuck or eraser holder 22 is formed at one end of nippleV I9 forreceiving oneend of a cylindrical eraser 23. This eraser is'preferablymade witha hard centre 24 or a centre section of greater abrasivequalities than that of the surrounding outer section thereof to give tothis elongated rubber eraser more rigidity which has been found moredesirable during its erasing operations.

. To disassemble the various parts of the-instrument when it is desiredto replace any one or all the parts thereof or when the same requirecleaning, it is simply necessary to remove the plug 4 whereby access maybe gained with a small screw driver through the then opened end of thetube I to the nut I0 and by removing the latter the section I and thespring 1 may be removed from the connector section I I.

By disconnecting the section I'I from the sleeve I3 the spindle 9 may beremoved and by disconnecting the sleeve I3 from the eraser holdingsection I.9 the spring 20 as well as the socket member I8 may be removedwhereby access to all of the several working parts of `the instrumentmay be had.

A push button assembly 25 is secured to the eraser holding section I9,as shown in Fig. 6, and comprisesa push button |25 slidably mounted on ashouldered sleeve 225, which is threadedly connected in an opening 325to the nipple I9. A stem 425 is movable in this-opening with its innerend in abutment with the socket member I8 and its outer end in abutmentwith one end of a spring 525, the other end of which spring is inabutment with the button |25. The

button is normally retained in an extended posi- Formed in the outerface of the section I9 is a longitudinally extending groove 26. One endof this groove, which terminates with the outer end of the section I9,is open and the opposite side walls thereof are tapered inwardly =awayfrom the base ofpthe'groove. 'The beak vshaped lug 21 having supportingengagement with the opposite side walls of the groove 26 will nt anyconventional forked type-bar guide of a typewriter and comprises abearing block 28 which is capable of having slidable engagement Theopposite side walls of this block are :tapered so as to be received bythetapered side walls of the groove 26 in order to retain the block 28within this groove.

"This block is split longitudinally and a tapered screw 29 has threadedengagement therewith whereby the split sections of the block may beforced into or let out of frictional engagement with the side walls ofthe groove for adjustably retaining the block and the lug 21 formedtherewith in various positions within said groove. The block 28 haspivotally connected thereto-by means of the pin 3B a lug 3l. One end ofthis lug 3| is tapered to correspond with the `tapered end of the lug 21whereas the opposite end of the=lug 6I has a resilient or non-skiddingplug 32 seated therein. lWhen employing theinstrument with type-barguides of typewriters having pressed metal forks or forks with a deepslot therebetween,l both lthe lug 21 and lug 3I lmay be inserted thereinas shown in Fig. 10 of Vthe'drawings, but where .there is lonly ashallow recess between the forks ofthe type-bar guide as shown in Fig.11A the lug SI is moved at right angles to the lug 21 so that thelatter' may fit therein. When the type-bar guides of the typewriter arenot employed to support the instrument the lug 3l may be turnedupon`itspivoted support until the rear or squared end thereof projects beyondthe lug 21' and instrument so that the resilient plug 32 may rest uponthe platen of the typewriter or other support when rotating the eraser4in the manner as shown in Fig. 13 of the drawings.

From the foregoing it is apparent that the instrument may be compactedso as to occupy a-relatively small amount of space when not in use orwhen making ordinary erasing operations as illustrated in Fig. l2 of thedrawings. Also, by simply inserting the lug 21 within the forkedtype-bar guide of a typewriter, the instrument will be supported in sucha manner that with only one hand of the operator the handle I may bereciprocated for transmitting rotary movement to the eraser. The lug 21in conjunction with the type-bar guide will direct and hold the eraserexactly upon the matter to be'erased without erasing or smearing thewritten matter adjacent thereto. .When the matter to be erased is ,notadjacent .to .the type-bar guide of the typewriter the instrument maystill be used by usingthe non-skid end 32 of the lug as a support.

I claim:

1. An erasing instrument, for a typewriter having a type-bar guide,comprising a tubular handle, a body, means for telescopically connectingsaid body to said handle, an erasing element ycarried at a free end ofsaid body, a compound member comprising a pair of superposed lugs havingsimilarly tapered ends carried by said body, and means for pivotallyinterconnecting said lugs, said compound member being engageabl@ withthe type-bar guide.

2. A rotary eraser, for a typewriter having a type-bar guide, comprisinga tubular handle, a body, means for telescopically connecting said bodyto said handle, an erasing element carried at a free end of said body,means responsive to telescopic movement of said body and handle forrotating said erasing element, a member, means for adjustably andslidably connecting said member to said body, and a beak-shaped lugcarried by said member engageable with the typebar guide.

3. A rotary eraser, for a typewriter having a type-bar guide, comprisinga tubular handle, a body having a longitudinal groove on its exteriorsurface, means for telescopically connecting said body to said handle,an erasing element carried at a free end of said body, means responsiveto telescopic movement of said body and handle for rotating said erasingelement, a member including a block adjustably mounted upon said groove,means for retaining said block in an adjusted position, a beak-shapedlug carried by said block engageable with the type-bar guide, and a lugpivotally mounted upon said block.

4. A rotary eraser, comprising, in combination, a tubular handle, a bodyhaving a longitudinal groove on its exterior surface, means fortelescopically connecting said body to said handle, a cylindricalerasing element carried at a free end of said body, means responsive totelescopic movement of said body and handle for rotating said erasingelement, a member including a block adjustably mounted upon said groove,means for retaining said block in an adjusted position, a beak-shapedlug carried by said block. and an antiskidding plug disposed at one endof said lug.

RENE JENNY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 402,710 Baldwin et al May 7, 1889834,783 Weguelin Oct. 30, 1906 933,299 Gardner Sept. 7, 1909 1,038,525Brenenstul Sept. 17, 1912 1,281,223 Stepanchak Oct. 8, 1918 1,355,026Austin Oct. 5, 1920 1,424,221 Trumpeter Aug.` 1, 1922 2,123,877 BoothJuly 19, 1938 FOREIGN PATENTS Number Country Date 24,507 Great/Britainof 1895 759,168 France Nov. 16, 1923 554,832 Germany July 13, 1932237,799 Switzerland Jan. 16, 1947

